Methodology for estimating dietary data from the semi-quantitative food frequency questionnaire of the Mexican National Health and Nutrition Survey 2012

Abstract

Objective. To describe the methodology used to clean up and estimate dietary intake (DI) data from the SemiQuantitative Food Frequency Questionnaire (SFFQ) of the Mexican National Health and Nutrition Survey 2012. Materials and methods. DI was collected through a shortterm SFFQ regarding 140 foods (from October 2011 to May 2012). Energy and nutrient intake was calculated according to a nutrient database constructed specifically for the SFFQ. Results. A total of 133 nutrients including energy and fiber were generated from SFFQ data. Between 4.8 and 9.6% of the survey sample was excluded as a result of the cleaning process. Valid DI data were obtained regarding energy and nutrients consumed by 1 212 pre-school children, 1 323 school children, 1 961 adolescents, 2 027 adults and 526 older adults. Conclusions. We documented the methodology used to clean up and estimate DI from the SFFQ used in national dietary assessments in Mexico.

Dietary intake and adequacy of energy and nutrients in Mexican older adults: results from two National Health and Nutrition Surveys

“…2006 Ensanut 11 varies with respect to 2012 Ensanut, 12 2) The range of references of adequacies varies between both surveys, and 3) The SFFQ of 2012 considers 39 items more compared to the 2006 SFFQ; although we point out that both surveys used the same base for food nutritional composition, any interpretation of these changes must be done cautiously.…”

“…This results could due to the dietary assessment method used, since the 7d SFFQ does not capture the "usual or habitual" diet of the OA (that explains the maintaining of their body mass) which, considering the underreporting of energy. 12 These data regarding the energy intake contraste with the high prevalence of overweight, obesity and abdominal obesity. In addition, 66.5% of OA did not meet their estimated protein requirement (1g/kg/d), De la Cruz-Góngora V y col.…”

“…The proportion of underreports in 2006 was no different with respect to 2012. 12 Also, nonparametric models were used for the adjusted intake estimation, which were not influenced by the extremes of the nutrient distribution.…”

“…The consumption of foods that were above three standard deviations (>3 SD) was eliminated. 12 The nutritional contribution of the food was obtained using the nutritional composition table. Intake adequacy percentages.…”

“…12 Nutritional status. The weight and height were obtained by standardized and trained personnel 16 in adults who had no limitations for having their height and weight measured while standing.…”